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Quartz crystal with chlorite inclusions from Minas Gerais, Brazil (size: 4.2 × 3.9 × 3.3 cm) Chlorite is a common mineral, found in metamorphic, igneous, and sedimentary rocks. It is an important rock-forming mineral in low- to medium-grade metamorphic rock formed by metamorphism of mafic or pelitic rock. [9]
Seraphinite is a trade name for a particular form of clinochlore, a member of the chlorite group. Seraphinite; Seraphinite specimen. General; Category: Seraphinite ...
It is associated with chlorite, epidote, quartz, calcite and prehnite. It was first described in 1925 for occurrences in the Calumet mine, Houghton Co., Keweenaw Peninisula, Michigan, and named for United States geologist Raphael Pumpelly (1837–1923). [9]
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
Cookeite is a mineral species of the silicate group and the phyllosilicate subgroup, part of the chlorite family, with the formula LiAl 4 (Si 3 Al)O 10 (OH) 8. [1] This soft, low-density mineral of variable color has a crystalline structure made up of alternating layers LiAl 2 (OH) 6 and Al 2 O 4 (OH) 2 Si 8 O 12 having several polytypes.
Chalcedony: traditionally a fibrous cryptocrystalline quartz var., more recently, a mixture of quartz and moganite. Structural groups are crystallographic groups that may contain minerals from more than one class/ subclass. Supergroups contain minerals from more than one class/ subclass. Anilite transforms to digenite during grinding.
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Thus, for example, quartz and stishovite are two different minerals consisting of the same compound, silicon dioxide. ( Full article... Mineralogy is a subject of geology specializing in the scientific study of the chemistry , crystal structure , and physical (including optical ) properties of minerals and mineralized artifacts .